In 20 years of practice, I only know of 5 instances and all were borrower initiated.  

Like nuts and bolts or philosophy or practice?

The truth is, these policies practically never pay. 

I think saving up some more and practicing analyzing deals might be my best next course of action.

Keeping you out of trouble with the State (the general rule of thumb is if you are practicing real estate for other people (i.e. buyers and sellers), for compensation, then you need a license.)

This is a medical practice building with one tenant.

Can anyone point me to best practice resource for a partnership agreement, private placement memorandum (PPM), and/or other critical documents that need to be in order for the purposes of something as buying a piece of investment property with a business partner, or as complicated as function as a sponsor syndicating a piece of investment real estate?

That effectively lowers the mortgage rate you are paying.I believe your primary mortgage interest + state/local taxes must be below $10,000 to be fully deductible and you have to overcome the standard deduction value to get practical value. 

So, I'm trying to be conservative and allow for increases, but also don't want to kill deals being too conservative.What is your best practice?

I am a noob here as a 43 year old physician struggling to keep up the hours of my busy practice and I am looking for tips on starting investment by BRRRR'ing (is that a verb?)